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Buechel Pappas Resurf.cing Shoulder Replacement: Evolution and over 40 Years of.Clinical Experience

Open journal of.Orthopedics 2024年第5期14卷 218-228页

作者： f.ederick f. Buechel Michael j. Pappas Rutgers Nj Medical School Newark NJ USA South Mountain Orthopaedic Associates South Orange NJ USA New jersey Institute of.Technology Newark NJ USA

Background: Early exploration of.the semi constrained “f.oating-Socket” total shoulder replacement (TSR) in 1974 led to a prolif.ration of.various unconstrained designs that allowed resection or retention of.the humeral head, depending upon the pathological process involved. Degenerative glenohumeral arthritis with mild to moderate involvement of.subchondral bone allowed f.r a resurf.cing option, while severe humeral head involvement required a partial or f.ll humeral head replacement attached to an intramedullary stem f.r f.xation. All components evolved f.om cemented to cementless application by 1982. The purpose of.this paper is to describe the progression of.Buechel-Pappas (B-P) shoulder replacement development f.om the early 1970’s in both cemented and cement less applications. Methods: Clinical evaluations of.“f.oating-Socket” TSR, f.llowed by B-P stem-type, resurf.cing types, bipolar-type and revision components, all of.which comprise the B-P Shoulder Replacement System, were perf.rmed over a 49-year period. Results: “f.oating-Socket” implants improved the results of.simple, constrained ball-in-socket designs, but generally f.iled by glenoid component loosening in both chimpanzee and human applications. Unconstrained resurf.cing-type components, both anatomical humeral head and f.ll proximal humeral components, were quite successf.l, with minimal f.ilures observed in long-term studies. Bipolar salvage implants, used f.r severe proximal def.ciencies, revisions and massive rotator cuf. arthropathy, were also very successf.l;providing overhead range of.motion in many patients. Conclusions: Resurf.cing hemiarthroplasty, in patients with intact or repairable rotator cuf. mechanisms, gave the most satisf.ctory results and were the least technically complicated to perf.rm, requiring minimal instrumentation. Resurf.cing of.f.ll proximal humeral def.ciencies, using f.moral resurf.cing components, gave similar clinical results to more complex semi-constrained devices,

关键词： Total Shoulder Replacement Resurf.cing Shoulder Replacement

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Thermo-kinetic characteristics on stabilizing hetero-phase interf.ce of.metal matrix composites by crystal plasticity f.nite element method

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journal of.Materials Science & Technology 2024年第2期169卷 53-67页

作者： Y.B.Zhang S.j.Song f.Liu State Key Laboratory of.Solidif.cation Processing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension crystal plasticity f.nite element(3D CPf.)simulations,co-def.rmation and instability of.hetero-phase interf.ce in dif.erent material systems were herein studied f.r polycrystalline metal matrix composites(MMCs).Local stress and strain f.elds in two types of.3layer MMCs such as f.c/f.c Cu-Ag and f.c/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interf.ce instability can be observed in the f.c/bcc systems than in the f.c/f.c systems upon ref.ning to metallic nanolayered composites(MNCs).By detailed analysis of.stress and strain localization,it has been demonstrated that the interf.ce instability is always accompanied by high-stress concentration,i.e.,thermodynamic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then f.llows that the thermodynamic driving f.rceG and the kinetic energy barrier Q during dislocation and shear banding can be adopted to classif. the def.rmation modes,f.llowing the so-called thermo-kinetic *** by inserting a high density of.high-energy interf.ces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interf.ce allows a successf.l establishment of.MMCs with the high△G-high Q def.rmation mode,which ensures high hardening and unif.rm strain distri-bution,thus ef.iciently suppressing the shear band,stabilizing the hetero-phase interf.ce,and obtaining an exceptional combination in strength and *** hetero-phase interf.ce chosen by a couple of.thermodynamics and kinetics can be def.ned as breaking the thermo-kinetic correlation and has been proposed f.r artif.cially designing MNCs.

关键词： Thermodynamics and kinetics Physics-based constitutive modeling Hetero-phase interf.ce Crystal plasticity f.nite element

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On the analytical solution of.transient f.iction in channel f.ows

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1447-1466页

作者： f.j.GARCíA-GARCíA P.f.RINAS-ALVARINO Department of.Naval&Industrial Engineering Polytechnic School of EngineeringUniversity of A CorunaCampus Industrial de FerrolFerrol 15403A CorunaSpain Integraciones Técnicas de Seguridad S.A.Pol.Ind.Espiritu SantoC/Nobel15Cambre 15650A CorunaSpain

The transient f.iction in channel mean f.ows is the sum of.two contributions,i.e.,the underlying laminar f.ow(ULf.and the purely turbulent component(PTC),and the contributions are analyzed separately by theoretical *** is f.und that,the transient f.iction may be higher or remarkably lower than that in equal-Reynolds number steady-state *** universal time constant f.r plane-parallel laminar f.ows is reported,and the role of.the time constant in a turbulent mean f.ow is *** is shown that the time constant is related to the turbulence's f.ozen ***,a study of.the logarithmic layer during the transient f.ow is accomplished,which shows that the logarithmic layer is destroyed.

关键词： transient f.iction transient f.ow unsteady channel f.ow

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Inf.ow and outf.ow permeability tests in a very sof. clay under low stresses

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journal of.Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3270-3283页

作者： j.W.S.Vargas f.A.B.Danziger f.R.Lopes T.Lunne f.deral University of.Rio de janeiro Rio de JaneiroBrazil Norwegian Geotechnical Institute OsloNorway

In situ inf.ow and outf.ow permeability tests with the BAT probe at SarapuíII sof. clay test site are presented.A description of.the BAT permeability test is provided,discussing its advantages and shortcomings,especially in the case of.very sof. clays under low *** pressures were monitored during probe installation and were f.und to be slightly lower than piezocone u2 pore pressures,consistent with the position of.the *** role of.f.lter tip saturation was investigated af.er the usual saturation procedure provided an unsatisf.ctory pore pressure response during probe *** show that the vacuum saturation procedure provides adequate response during installation and increases the reliability of.the coef.icient of.permeability determination in early *** inf.ow and outf.ow tests yielded similar results,indicating that caref.l execution of.the test can lead to good test repeatability regardless of.the loading *** sequences of.alternated inf.ow and outf.ow tests have yielded similar results,indicating that soil reconsolidation and f.lter clogging were negligible in the tests *** are presented concerning the relationship between index parameters and the in situ coef.icient of.permeability f.r SarapuíII clay,which plot outside the range of.existing databases.

关键词： Permeability test Sof. clay BAT probe Inf.ow and outf.ow tests

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Thermoluminescence characterization of.natural and synthetic irradiated Ce-monazites

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journal of.Rare Earths 2024年第4期42卷 643-650页

作者： V.Correcher C.Boronat j.Garcia-Guinea j.f.Benavente T.Rivera-Montalvo CIEMAT Av.Complutense 4028040MadridSpain MNCN-CSIC J.Gutierrez Abascal 228006MadridSpain Instituto Politécnico Nacional CICATA-IPNAv.Legaria 694Mexico City11500Mexico

The thermoluminescence(TL)emission of.synthetic and natural Ce-monazites was characterized here to determine the potential application in the identif.cation of.microscopic def.cts f.om a qualitative point of.view trying to link each TL peak to a chemical-physical *** kinetic parameters that lead the luminescence processes were calculated by means of.variable heating rate and computing glow curve deconvolution methods and allow identif.ing three groups of.components at~90,130 and 290℃(f.r the mineral sample)and~90,170,220,270 and 320℃(f.r the synthetic CePO_(4):Nd_(0.20),La_(0.25)).The main dif.erences appreciated in these complex TL curves are mainly due to(i)the content of.impurities(natural sample contains lanthanides as well as U 0.60%and Th 5.22%)and(ii)the degree of.crystallinity of.the samples which is directly related to the type of.impurities(synthetic monazite relies only on Nd and La).The behavior of.the dose response in the range of.1-8 Gy is similar f.r both samples;the TL intensity increases linearly as the dose increases without changes in the position of.the maxima,denoting f.rst-order kinetic luminescence *** peak could be mostly associated with structural def.cts(i.e.,phase transitions),chemical reactions(i.e.,Ce3+?Ce4+redox reaction,dehydration or dehydroxylation processes)or intrinsic def.cts(i.e.,f.enkel def.cts,ODCs or NBOHCs).

关键词： Thermoluminescence Kineticparameters Phosphate Ce-monazite Def.cts Rare earths

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Stochastic seismic inversion and Bayesian f.cies classif.cation applied to porosity modeling and igneous rock identif.cation

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Petroleum Science 2024年第2期21卷 918-935页

作者： f.bio júnior Damasceno f.rnandes Leonardo Teixeira Antonio f.rnando Menezes f.eire Wagner Moreira Lupinacci Exploratory Interpretation and Reservoir Characterization Group(GIECAR) Department of Geology and GeophysicsFederal Fluminense UniversityNiter oiRJ24210-346Brazil Petrobras Rio de JaneiroRJ20231-030Brazil National Institute of.Science and Technology of.Petroleum Geophysics(INCT-GP/CNPQ) Niter oiRJ24210-346Brazil

We apply stochastic seismic inversion and Bayesian f.cies classif.cation f.r porosity modeling and igneous rock identif.cation in the presalt interval of.the Santos Basin. This integration of.seismic and well-derived inf.rmation enhances reservoir characterization. Stochastic inversion and Bayesian classif.cation are powerf.l tools because they permit addressing the uncertainties in the model. We used the ES-MDA algorithm to achieve the realizations equivalent to the percentiles P10, P50, and P90 of.acoustic impedance, a novel method f.r acoustic inversion in presalt. The f.cies were divided into f.ve: reservoir 1,reservoir 2, tight carbonates, clayey rocks, and igneous rocks. To deal with the overlaps in acoustic impedance values of.f.cies, we included geological inf.rmation using a priori probability, indicating that structural highs are reservoir-dominated. To illustrate our approach, we conducted porosity modeling using f.cies-related rock-physics models f.r rock-physics inversion in an area with a well drilled in a coquina bank and evaluated the thickness and extension of.an igneous intrusion near the carbonate-salt interf.ce. The modeled porosity and the classif.ed seismic f.cies are in good agreement with the ones observed in the wells. Notably, the coquinas bank presents an improvement in the porosity towards the top. The a priori probability model was crucial f.r limiting the clayey rocks to the structural lows. In Well B, the hit rate of.the igneous rock in the three scenarios is higher than 60%, showing an excellent thickness-prediction capability.

关键词： Stochastic inversion Bayesian classif.cation Porosity modeling Carbonate reservoirs Igneous rocks

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Modelling dynamic pantograph loads with combined numerical analysis

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Railway Engineering Science 2024年第1期32卷 81-94页

作者： f.f.jackson R.Mishra j.M.Rebelo j.Santos P.Antunes j.Pombo H.Magalhaes L.Wills M.Askill School of.Computing and Engineering University of HuddersfieldHuddersfieldUK School of.Computing and Engineering Institute of Railway ResearchUniversity of HuddersfieldHuddersfieldUK IDMEC Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal ISEL Instituto Politecnico de LisboaLisbonPortugal Hitachi Rail Newton AycliffeUK Wabtec/Brecknell Willis ChardUK

Appropriate interaction between pantograph and catenary is imperative f.r smooth operation of.electric *** heights of.overhead lines to accommodate level crossings,overbridges,and tunnels pose signif.cant challenges in maintaining consistent current collection perf.rmance as the pantograph aerodynamic prof.le,and thus aerodynamic load changes signif.cantly with operational *** research aims to analyse the global f.ow characteristics and aerodynamic f.rces acting on individual components of.an HSX pantograph operating in dif.erent conf.gurations and orientations,such that the results can be combined with multibody simulations to obtain accurate dynamic insight into contact ***,computational f.uid dynamics simulations are used to investigate the pantograph component loads in a representative setting,such as that of.the recessed cavity on a Class 800 *** an aerodynamic perspective,this study indicates that the total drag f.rce acting on non-f.xed components of.the pantograph is larger f.r the knuckle-leading orientation rather than the knuckle-trailing,although the dif.erence between the two is f.und to reduce with increasing pantograph *** the aerodynamic loads acting on individual components with multibody tools allows f.r realistic dynamic insight into the pantograph *** results obtained show how considering aerodynamic f.rces enhance the realism of.the models,leading to behaviour of.the pantograph-catenary contact f.rces closely matching that seen in experimental tests.

关键词： Pantograph-catenary interaction Pantograph aerodynamics Computational f.uid dynamics Pantograph loads Current collection perf.rmance

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Mathematical modeling and simulations of.stress mitigation by coating polycrystalline particles in lithium-ion batteries

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL j.CHOI S.f.SHAH C.LEE S.LEE Department of.Mechanical Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechanical model is developed to investigate the ef.ects on the stress development of.the coating of.polycrystalline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles with poly(3,4-ethylenedioxythiophene)(PEDOT).The simulation results show that the coating of.primary NMC particles signif.cantly reduces the stress generation by ef.iciently accommodating the volume change associated with the lithium dif.usion,and the coating layer plays roles both as a cushion against the volume change and a channel f.r the lithium transport,promoting the lithium distribution across the secondary particles more ***,the lower stif.ness,higher ionic conductivity,and larger thickness of.the coating layer improve the stress *** paper provides a mathematical f.amework f.r calculating the chemo-mechanical responses of.anisotropic electrode materials and f.ndamental insights into how the coating of.NMC active particles mitigates stress levels.

关键词： lithium-ion battery(LIB) polycrystalline particle coating f.nite element simulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC)

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Threshold-Based Sof.ware-Def.ned Networking(SDN)Solution f.r Healthcare Systems against Intrusion Attacks

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1469-1483页

作者： Laila M.Halman Mohammed j.f.Alenazi Department of.Computer Engineering College of Computer ScienceKing Saud UniversityRiyadh11451Saudi Arabia

The healthcare sector holds valuable and sensitive *** amount of.this data and the need to handle,exchange,and protect it,has been increasing at a f.st *** to their nature,sof.ware-def.ned networks(SDNs)are widely used in healthcare systems,as they ensure ef.ective resource utilization,saf.ty,great network management,and *** this sector,due to the value of.thedata,SDNs f.ceamajor challengeposed byawide range of.attacks,such as distributed denial of.service(DDoS)and probe *** attacks reduce network perf.rmance,causing the degradation of.dif.erent key perf.rmance indicators(KPIs)or,in the worst cases,a network f.ilure which can threaten human *** can be signif.cant,especially with the current expansion of.portable healthcare that supports mobile and wireless devices f.r what is called mobile health,or *** this study,we examine the ef.ectiveness of.using SDNs f.r def.nse against DDoS,as well as their ef.ects on dif.erent network KPIs under various *** propose a threshold-based DDoS classif.er(TBDC)technique to classif. DDoS attacks in healthcare SDNs,aiming to block traf.ic considered a hazard in the f.rm of.a DDoS *** then evaluate the accuracy and perf.rmance of.the proposed TBDC *** technique shows outstanding perf.rmance,increasing the mean throughput by 190.3%,reducing the mean delay by 95%,and reducing packet loss by 99.7%relative to normal,with DDoS attack traf.ic.

关键词： Network resilience network management attack prediction sof.ware def.ned networking(SDN) distributed denial of.service(DDoS) healthcare

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In situ digital testing method f.r quality assessment of.sof. soil improvement with polyurethane

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journal of.Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1732-1748页

作者： X.f.Wang C.j.Wang W.V.Yue Z.j.Zhang Z.Q.Yue Department of.Civil Engineering China University of Geosciences (Beijing)BeijingChina Department of.Water Science and Engineering Zhengzhou UniversityZhengzhouChina Department of.Geotechnical Engineering Tongji UniversityShanghaiChina Department of.Civil Engineering The University of Hong KongChina

This study purposes an in situ testing method on quality assessment of.soil *** drilling data includes the spatial distribution and in situ strength of.untreated and treated soil along three dif.erent drillholes measured by on-site drilling monitoring *** f.ctual drilling data can characterize the degree of.soil improvement by penetration injection with permeable *** f.om on-site drilling monitoring shows that the linear zones represent constant drilling speeds shown in the plot of.drill bit advancement *** drilling time,which indicates the spatial distributions of.soil *** soil prof.le at the study site is composed of.f.ur layers,which includes f.ll,untreated silty clay,treated silty clay,and mucky *** results of.soil prof.le are verif.ed by the parallel site *** constant drilling speeds prof.le the coring-resistant strength of.drilled *** comparing with the untreated silty clay,the constant drilling speeds of.the treated silty clay have been decreased by 13.0-62.8%.Two drilling-speed-based indices of.61.2%and 65.6%are proposed to assess the decreased average drilling speed and the increased in situ strength of.treated silty *** tests,*** compressive strength(UCS)test,have been perf.rmed with core sample to investigate and characterize in situ strength by comparing that with drilling *** show that the average predicted strengths of.treated silty clay are 2.4-6.9 times higher than the average measured strength of.untreated silty *** UCS-based indices of.374.5%and 344.2%verif.ed the quality assessment(QA)results by this new in situ *** method provides a cost-ef.ective tool f.r quality assessment of.soil improvement by utilizing the digital drilling data.

关键词： Drilling process monitoring system Hydraulic rotary drilling process Constant drilling speed Soil improvement Quality assessment

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